About this item Front & Rear Led Light Technology: GoRide Bike helmet has 3 White LEDs on the front and 10 LEDs on the back, 150 total lumens support your adventures (Charge lasts 6-10 hours based on lighting configuration). These rear LED Helmet light also provide excellent protection and visibility (be seen) on city streets. The complete in-mold construction and a soft lining ensure that your helmet is comfortable on every ride. Adjustable & Ventilation: Simply snap the chin strap into place, adjust the dial at the back, and ride carefree. Hit the road day in, day out without worries. A contoured design with inside air-channels force ventilation through and around the bike helmet pulls cool air in through the front and pushes it through an air-channel matrix to reduce overheating. Comfort & Fitting: GoRide electric bike helmet specialized designs for urban commuting, and bike cycling and suitable for city, road, trek bike, etc. Head circumference Size M 21.2”-22.4” (54-57cm). Size L 22.8”-24” (58-61cm). Ideal for men, women, young, or old, this helmet features an adjustable dial for a snug and secure fit. Safe & Stylish: GoRide helmets for adults has a compact and stylish design to match your business or casual style. Improve your safety in the dark. It has a variety of lighting modes to meet the needs of different situations. It makes you safer when driving at night. A compact and stylish design to match your business or casual style. Great for Bike Riders: Our professional cycling helmets are perfect for bike riders. Suit for Multiple Sports Cycling, Bike, BMX Biking. The GoRide Casco para Bicicleta is guaranteed to put a huge smile on any rider.